#669B9B
Closest named color: Cadet Blue (#5F9EA0). oklch(65.3% 0.056 195.9), rgb(102, 155, 155).
Aa
Black text reads best on this color (6.72:1).
About this color
#669B9B is a medium-light, muted teal or cyan. In OKLCH its lightness is 65%, its chroma 0.056 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.011 away. Black text reads best on it, at 6.72:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.72:1 |
| White text | 3.12:1 |
Values
| HEX | #669B9B |
| RGB | rgb(102, 155, 155) |
| HSL | hsl(180, 21%, 50%) |
| OKLCH | oklch(65.3% 0.056 195.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #669B9B | 3.12:1 | AA large text | Lc -63.6 | Content text, not long reading |
| Black text on #669B9B | 6.72:1 | AA | Lc 45.9 | Large or bold text, headings |
| #669B9B text on white | 3.12:1 | AA large text | Lc 58.2 | Large or bold text, headings |
| #669B9B text on black | 6.72:1 | AA | Lc -43.6 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4ECEB
oklch(93.7% 0.009 188.1)
-
Step 200
200
#CEDCDC
oklch(88.4% 0.015 196.9)
-
Step 300
300
#ADC6C6
oklch(80.8% 0.027 196.6)
-
Step 400
400
#81AAA9
oklch(70.8% 0.044 194.3)
-
Step 500
500 (this color)
#669B9B
oklch(65.3% 0.056 195.9)
-
Step 600
600
#447F7F
oklch(55.7% 0.062 195.5)
-
Step 700
700
#366B6B
oklch(49.2% 0.057 195.5)
-
Step 800
800
#2D5757
oklch(42.7% 0.047 195.5)
-
Step 900
900
#294848
oklch(37.8% 0.037 195.7)
-
Step 950
950
#192A2A
oklch(27% 0.023 195.9)
#669B9B with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #94969B | 0.058 |
| Deuteranopia (no green cones) | #8B8F9B | 0.055 |
| Tritanopia (no blue cones) | #519E9B | 0.021 |
| Achromatopsia (no color) | #929292 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669B9B
#669B9B
oklch(65.3% 0.056 195.9)
- #B08284
#B08284
oklch(65.2% 0.057 15.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #669B9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.011
- Dull Teal #5F9E8F ΔE 0.024
- Grey Teal #5E9B8A ΔE 0.028
- Sea #3C9992 ΔE 0.042
- Greyblue #77A1B5 ΔE 0.046
- Blue Grey #758DA3 ΔE 0.048
- Dusty Teal #4C9085 ΔE 0.052
- Persian Green #2A9D8F ΔE 0.053
Use #669B9B in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.